Integration of light and plastid signals.
Light and plastid signals promote chloroplast biogenesis and are among the most potent inducers and repressors of photosynthesis-related gene expression, respectively. These signals can be likened to a 'gas and brake system' that promotes efficient chloroplast biogenesis and function. Recent findings indicate that a particular plastid signal can 'rewire' a light signaling network, converting it from an inducer into a repressor of particular photosynthesis-related genes. Therefore, a plastid signal appears to be an endogenous regulator of light signaling rather than a signal acting independently from light. This integration of light and plastid signals may allow plants to proactively manage chloroplast dysfunction when performing chloroplast biogenesis and maintenance in adverse light conditions.
Larkin
Robert M
RM
Michigan State University, Department of Energy Plant Research Laboratory, United States. larkinr@msu.edu
Ruckle
Michael E
ME
D002467:Cell Nucleus / Q000235:genetics; D017343:Genes, Plant; D055537:Light Signal Transduction; D010788:Photosynthesis / Q000235:genetics; D018087:Plastids / Q000378:metabolism*